NDLI: On the effects of sea roughness on the predictions of pathlosses above sea

Content Provider	IEEE Xplore Digital Library
Author	Dion, D. Gardenal, L.
Copyright Year	2000
Description	Author affiliation: Defence Res. Establ. Valcartier, Val-Belair, Que., Canada (Dion, D.)
Abstract	In the last few years, a major weakness of modern path loss prediction methods over sea has been thought to be the inadequate treatment of sea roughness in the models. Nevertheless, experimental investigations of the effect of sea roughness on prediction quality are lacking. In this paper, we show prediction errors obtained as a function of wind speed, from which sea roughness can be inferred, using models that neglect surface roughness. Data obtained from trans-horizon propagation links at 3 and 10.5 GHz, setup near the littoral in the Atlantic Ocean and in the Mediterranean, are considered in the analysis. Prediction errors were found to reach a maximum at moderate wind speeds (/spl sim/10 m/s), and then to decrease with increasing wind speeds. The analysis supports the idea that prediction error increases with growing wave height (sea state) and decreases as the waves break and the conditions homogenize.
Starting Page	370
Ending Page	374
File Size	409932
Page Count	5
File Format	PDF
ISBN	0780357760
DOI	10.1109/RADAR.2000.851862
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-05-12
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ocean temperature Refractive index Sea surface Rough surfaces Surface roughness Predictive models Wind speed Surface treatment Electromagnetic propagation Modems
Content Type	Text
Resource Type	Article

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